JP2016141348A - Contact wire - Google Patents
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Abstract
Description
本発明は、トロリ線に関し、特に、ヘビーシンプル架線に好適なトロリ線に関する。 The present invention relates to a trolley wire, and more particularly to a trolley wire suitable for a heavy simple overhead wire.
従来、新幹線の架線として、吊架線、補助吊架線、トロリ線の３本で構成されるヘビーコンパウンド架線が用いられている（例えば、特許文献１参照）。 Conventionally, as an overhead line of a Shinkansen, a heavy beacon pound overhead line composed of a suspended overhead line, an auxiliary suspended overhead line, and a trolley line has been used (see, for example, Patent Document 1).
図１（ａ）は、ヘビーコンパウンド架線３０の概略図である。ヘビーコンパウンド架線３０においては、補助吊架線３２がドロッパー３４により吊架線３１から吊り下げられ、トロリ線３３がハンガー３５により補助吊架線３２から吊り下げられ、吊架線３１、補助吊架線３２、トロリ線３３が並列に配線される。
FIG. 1A is a schematic diagram of the heavy beacon pound overhead line 30. In the heavy beacon pound overhead wire 30, the auxiliary suspension wire 32 is suspended from the suspension wire 31 by the
このヘビーコンパウンド架線３０に使用されるトロリ線３３には、銅錫の合金系、銅鋼の複合系材料からなるトロリ線が適用されており、その公称断面積が１７０ｍｍ２である場合に加わる張力は最大で２トンである。 A trolley wire made of a copper-tin alloy system or a copper steel composite material is applied to the trolley wire 33 used for the heavy beacon pound overhead wire 30, and the tension applied when the nominal cross-sectional area is 170 mm 2. Is a maximum of 2 tons.
また、従来の架線の一つとして、ヘビーコンパウンド架線３０における補助吊架線３２を省き、吊架線とトロリ線の２本で構成されるヘビーシンプル架線（ヘビーシンプルカテナリ方式架線ともいう）が知られている（例えば、特許文献２参照）。 Further, as one of the conventional overhead lines, a heavy simple overhead line (also referred to as a heavy simple catenary type overhead line) is known which is composed of two suspension overhead lines and a trolley line, omitting the auxiliary suspension line 32 in the heavy beacon pound overhead line 30. (For example, refer to Patent Document 2).
図１（ｂ）は、ヘビーシンプル架線４０の概略図である。ヘビーシンプル架線４０においては、トロリ線４２がハンガー４３により吊架線４１から吊り下げられ、吊架線４１、トロリ線４２が並列に配線される。
FIG. 1B is a schematic view of the heavy simple overhead line 40. In the heavy simple overhead wire 40, the trolley wire 42 is suspended from the suspension wire 41 by the
架線の大電流容量化、架線の管理工数低減及び低コスト化のために、新幹線に用いる架線をヘビーコンパウンド架線３０からヘビーシンプル架線４０に切り替える場合、トロリ線に加わる張力を最大で２トン（１９．６ｋＮ）であったものから２.５トン（２４．５ｋＮ）以上に引き上げることが、集電性能向上のために必要不可欠である。また、大電流容量が必要であるために架線をヘビーコンパウンド架線３０からヘビーシンプル架線４０に切り替える場合、線条が３本から２本になることでトロリ線に流れる電流比率も高くなる。さらに、ヘビーシンプル架線４０のトロリ線４２に２．５トンの張力を加えたときの押上量、ひずみ量は、ヘビーコンパウンド架線３０のトロリ線３３に２トンの張力を加えたときの押上量、ひずみ量と同等であると予想される。 When switching the overhead line used for the Shinkansen from the heavy beacon pound overhead line 30 to the heavy simple overhead line 40 in order to increase the current capacity of the overhead line, to reduce the man-hours for managing the overhead line, and to reduce the cost, the tension applied to the trolley line is 2 tons at maximum (19 It is indispensable for raising the current collecting performance to raise it to 2.5 tons (24.5 kN) or more from what was .6 kN). Further, when the overhead wire is switched from the heavy beacon pound overhead wire 30 to the heavy simple overhead wire 40 because a large current capacity is required, the ratio of the current flowing through the trolley wire is increased by changing the number of the filaments from three to two. Furthermore, the amount of push-up and strain when 2.5 tons of tension is applied to the trolley wire 42 of the heavy simple overhead wire 40 is the amount of push-up when 2 tons of tension is applied to the trolley wire 33 of the heavy beacon pound overhead wire 30; Expected to be equivalent to strain.
しかしながら、従来のトロリ線では、新幹線用のヘビーシンプル架線４０に用いるには振動疲労特性が不十分であり、具体的には、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したときに、トロリ線が疲労断線するまでの振動回数が１０００万回以上となることは難しい。 However, the conventional trolley wire has insufficient vibration fatigue characteristics for use in the heavy simple overhead wire 40 for the Shinkansen. Specifically, under the condition of a strain of 500 μ with a tension of 2.5 tons. When a vibration fatigue test for applying vibration is performed, it is difficult for the number of vibrations until the trolley wire breaks through fatigue to be 10 million times or more.
また、銅被覆鋼の複合系材料からなるトロリ線は、電線としての安全率が２．５であり、銅錫系の合金材料からなるトロリ線の安全率２.２と比較して高いために、架線するときの張力を２.５トン以上にした場合に摩耗しろが少なく、ヘビーシンプル架線へ適用できないという問題がある。 Moreover, the trolley wire made of a copper-coated steel composite material has a safety factor of 2.5 as an electric wire, which is higher than the safety factor 2.2 of a trolley wire made of a copper-tin alloy material. There is a problem that, when the tension at the time of overhead wiring is 2.5 tons or more, there is little wear margin and it cannot be applied to heavy simple overhead wiring.
したがって、本発明の目的の１つは、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線を提供することにある。 Accordingly, one of the objects of the present invention is to provide a trolley wire suitable for a heavy simple overhead wire, which has excellent vibration fatigue characteristics even in a state where a high tension is applied.
本発明の一態様は、上記目的を達成するために、下記［１］〜［７］のトロリ線を提供する。 In order to achieve the above object, one embodiment of the present invention provides the following trolley wires [1] to [7].
［１］架線する際の張力が２．５トン以上であるヘビーシンプル架線用のトロリ線であって、引張強さが４３０ＭＰａ以上であり、銅合金からなるトロリ線本体を有する、トロリ線。 [1] A trolley wire that is a trolley wire for a heavy simple overhead wire having a tension of 2.5 tons or more when it is wired, having a tensile strength of 430 MPa or more and having a trolley wire body made of a copper alloy.
［２］前記トロリ線本体の公称断面積が１６０ｍｍ２以上であり、前記トロリ線本体の引張荷重が６９ｋＮ以上である、上記［１］に記載のトロリ線。 [2] The trolley wire according to the above [1], wherein the trolley wire main body has a nominal cross-sectional area of 160 mm 2 or more, and the trolley wire main body has a tensile load of 69 kN or more.
［３］前記トロリ線本体の導電率が８０％ＩＡＣＳ以上である、上記［２］に記載のトロリ線。 [3] The trolley wire according to the above [2], wherein the conductivity of the trolley wire body is 80% IACS or more.
［４］前記トロリ線本体の伸び率が３．０％以上である、上記［２］又は［３］に記載のトロリ線。 [4] The trolley wire according to the above [2] or [3], wherein an elongation percentage of the trolley wire body is 3.0% or more.
［５］前記銅合金がＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金である、上記［１］〜［４］のいずれか１つに記載のトロリ線。 [5] The trolley wire according to any one of [1] to [4], wherein the copper alloy is a Cu—Sn—In alloy or a Cu—Sn alloy.
［６］前記トロリ線本体が、前記トロリ線本体の摩耗限度位置よりも下の位置に溝を有し、前記溝に摩耗検知用の検知線が挿入された、上記［１］〜［５］のいずれか１つに記載のトロリ線。 [6] The above [1] to [5], wherein the trolley wire main body has a groove at a position below a wear limit position of the trolley wire main body, and a detection line for wear detection is inserted into the groove. A trolley wire according to any one of the above.
［７］前記検知線が、絶縁電線、光ファイバのいずれかからなる、上記［６］に記載のトロリ線。 [7] The trolley wire according to the above [6], wherein the detection line is made of either an insulated wire or an optical fiber.
本発明によれば、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the trolley wire suitable for the heavy simple overhead wire which has the outstanding vibration fatigue characteristic even in the state where high tension was added can be provided.
〔実施の形態〕
（トロリ線の構造及び特性）
図２は、本発明の実施の形態に係るトロリ線１の径方向の断面図である。トロリ線１は、電車等の電気車用の架線に用いられるトロリ線であって、特に、新幹線等の高速で運転される電気車用のヘビーシンプル架線に好適なトロリ線である。また、トロリ線１は、ＪＩＳ Ｅ ２１０１に規定されたみぞ付硬銅トロリ線に該当する。
Embodiment
(Structure and characteristics of trolley wire)
FIG. 2 is a sectional view in the radial direction of the trolley wire 1 according to the embodiment of the present invention. The trolley line 1 is a trolley line used for an electric vehicle overhead line such as a train, and is particularly suitable for a heavy simple overhead line for an electric vehicle operated at a high speed such as a bullet train. The trolley wire 1 corresponds to a grooved hard copper trolley wire defined in JIS E2101.
トロリ線１のトロリ線本体１０は、上部の小弧面１１、下部の大弧面１２、両側部の小弧面１１と大弧面１２の間のＶ字状の溝１３と、大弧面１２の底部から所定の距離の位置に設けられた検知線用溝１４と、を有する。 The trolley wire body 10 of the trolley wire 1 includes an upper small arc surface 11, a lower large arc surface 12, a V-shaped groove 13 between the small arc surface 11 and the large arc surface 12 on both sides, and a large arc surface. 12 and a detection line groove 14 provided at a position a predetermined distance from the bottom.
トロリ線本体１０は、銅合金、例えば、Ｃｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金からなる。より具体的な例としては、Ｃｕ−Ｓｎ−Ｉｎ系合金の場合、錫（Ｓｎ）が０．２質量％以上０．４質量％未満、インジウム（Ｉｎ）が０．０５質量％以上０．２５質量％以下含有され、残部がＣｕと不可避不純物で構成される銅合金からなる。また、Ｃｕ−Ｓｎ系合金の場合、錫（Ｓｎ）が０．２質量％以上０．５質量％未満含有され、残部がＣｕと不可避不純物で構成される銅合金からなる。 The trolley wire body 10 is made of a copper alloy, for example, a Cu—Sn—In alloy or a Cu—Sn alloy. As a more specific example, in the case of a Cu—Sn—In alloy, tin (Sn) is 0.2 mass% or more and less than 0.4 mass%, and indium (In) is 0.05 mass% or more and 0.25%. It consists of a copper alloy that is contained by mass% or less and the balance is composed of Cu and inevitable impurities. Further, in the case of a Cu—Sn alloy, tin (Sn) is contained in an amount of 0.2% by mass or more and less than 0.5% by mass, and the balance is made of a copper alloy composed of Cu and inevitable impurities.
ヘビーシンプル架線に用いられるトロリ線本体１０には、２．５トンの張力が加わることが想定されるため、その引張強さは、４３０ＭＰａ以上である。例えば、トロリ線本体１０の公称断面積が１６０ｍｍ２である場合には、引張荷重が６９ｋＮ以上である。また、摩耗しろを大きくするためには、トロリ線本体１０の引張強さがより大きいことが好ましいが、大きすぎると後述する導電率が８０％ＩＡＣＳ（International Annealed Copper Standard）以上確保できないおそれや、検知線用溝１４の加工性が悪くなるおそれがあるため、トロリ線本体１０の引張強さは５００ＭＰａ以下であることが好ましい。 Since it is assumed that 2.5 tons of tension is applied to the trolley wire main body 10 used for the heavy simple overhead wire, the tensile strength is 430 MPa or more. For example, when the nominal cross-sectional area of the trolley wire body 10 is 160 mm 2 , the tensile load is 69 kN or more. Further, in order to increase the wear margin, it is preferable that the tensile strength of the trolley wire main body 10 is larger. However, if it is too large, the conductivity described later may not be 80% IACS (International Annealed Copper Standard) or more, Since the workability of the detection wire groove 14 may be deteriorated, the tensile strength of the trolley wire body 10 is preferably 500 MPa or less.
例えば、トロリ線本体１０の材料としてＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金を用いることにより、引張強さを４３０ＭＰａ以上とすることができる。 For example, the tensile strength can be set to 430 MPa or more by using a Cu—Sn—In alloy or a Cu—Sn alloy as the material of the trolley wire body 10.
トロリ線本体１０の伸び率は、高張力への耐曲げ性を考慮すると、ある程度の値を有することが好ましく、例えば、トロリ線本体１０の公称断面積が１６０ｍｍ２以上である場合には、３．０％以上であることが好ましい。 The elongation rate of the trolley wire body 10 preferably has a certain value in consideration of bending resistance to high tension. For example, when the nominal cross-sectional area of the trolley wire body 10 is 160 mm 2 or more, 3 It is preferably 0.0% or more.
トロリ線本体１０の導電率は、大電流容量の観点から、公称断面積が１６０ｍｍ２以上で導電率が８０％ＩＡＣＳ以上であることが好ましい。具体的には、大電流容量が必要であるために架線をヘビーコンパウンド架線からヘビーシンプル架線に切り替える場合、線条が３本から２本になることでトロリ線に流れる電流比率も高くなる。このことから、ヘビーシンプル架線に使用されるトロリ線では、公称断面積が１６０ｍｍ２以上で導電率が８０％ＩＡＣＳ以上であることが好ましい。例えば、ヘビーコンパウンド架線に用いられるトロリ線に要求される導電率が７０％ＩＡＣＳであった場合、２本の架線から構成されるヘビーシンプル架線に用いられるトロリ線は、３本の架線から構成されるヘビーコンパウンド架線に用いられるトロリ線よりも電流負荷が大きいため、７０％ＩＡＣＳの導電率では適用が不可となる。なお、８０％ＩＡＣＳ以上の導電率とする場合には、トロリ線本体１０の材料をＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金とすることが好ましい。 The electrical conductivity of the trolley wire body 10 is preferably a nominal cross-sectional area of 160 mm 2 or more and an electrical conductivity of 80% IACS or more from the viewpoint of a large current capacity. Specifically, when the overhead wire is switched from the heavy beacon pound overhead wire to the heavy simple overhead wire because a large current capacity is required, the ratio of the current flowing through the trolley wire is increased by changing the number of the filaments from three to two. From this, it is preferable that the trolley wire used for the heavy simple overhead wire has a nominal cross-sectional area of 160 mm 2 or more and a conductivity of 80% IACS or more. For example, when the electrical conductivity required for the trolley wire used for the heavy beacon pound overhead wire is 70% IACS, the trolley wire used for the heavy simple overhead wire composed of two overhead wires is composed of three overhead wires. Since the current load is larger than that of the trolley wire used for the heavy beacon pound overhead wire, it cannot be applied at a conductivity of 70% IACS. In addition, when setting it as the electrical conductivity of 80% IACS or more, it is preferable that the material of the trolley wire main body 10 is a Cu-Sn-In type alloy or a Cu-Sn type alloy.
トロリ線１は、図２に示されるように、トロリ線本体１０に設けられた検知線用溝１４内に配置された検知線２０を有することが好ましい。検知線２０は、導体２１と、導体２１の周囲を被覆する絶縁体２２とを有する絶縁電線から構成される。 As shown in FIG. 2, the trolley wire 1 preferably has a detection wire 20 disposed in a detection wire groove 14 provided in the trolley wire body 10. The detection wire 20 is composed of an insulated wire having a conductor 21 and an insulator 22 covering the periphery of the conductor 21.
トロリ線１を介して電気車に給電が行われる際には、トロリ線本体１０の大弧面１２の底部が、パンタグラフ等の電気車の集電装置に接触する。このため、集電装置の摺動により、トロリ線本体１０は大弧面１２の底部から摩耗する。摩耗が進むと、設定された摩耗限度位置１５に達する前に検知線２０が断線し、断線検知システムが作動して、トロリ線本体１０が限界に近いところまで摩耗していることが検知される。 When power is supplied to the electric vehicle via the trolley wire 1, the bottom of the large arc surface 12 of the trolley wire main body 10 comes into contact with a current collector of the electric vehicle such as a pantograph. For this reason, the trolley wire main body 10 is worn from the bottom of the large arc surface 12 by sliding of the current collector. When the wear progresses, the detection line 20 is disconnected before reaching the set wear limit position 15, the disconnection detection system is activated, and it is detected that the trolley wire main body 10 is worn to the limit. .
なお、図２では、検知線として絶縁電線を用いた例で説明したが、光ファイバを検知線として用いてもよい。すなわち、検知線２０の代わりに、光ファイバからなる検知線を用いてもよい。 In addition, although the example which used the insulated wire as a detection wire was demonstrated in FIG. 2, you may use an optical fiber as a detection wire. That is, instead of the detection line 20, a detection line made of an optical fiber may be used.
トロリ線本体１０の検知線用溝１４は、例えば、図２に示されるように、その上端が摩耗限度位置１５と一致するように形成される。これによって、摩耗が摩耗限度位置１５に達する前に、検知線２０が断線する。ここで、小弧面１１の上端と摩耗限度位置１５との距離をＬ１、摩耗しろである大弧面１２の底部と摩耗限度位置１５との距離をＬ２とする。 For example, as shown in FIG. 2, the detection line groove 14 of the trolley wire main body 10 is formed so that its upper end coincides with the wear limit position 15. Thereby, before the wear reaches the wear limit position 15, the detection line 20 is disconnected. Here, the distance between the upper end of the small arc surface 11 and the wear limit position 15 is L1, and the distance between the bottom of the large arc surface 12 that is the wear margin and the wear limit position 15 is L2.
また、トロリ線本体１０の耐強度、耐振動疲労特性を低下させないために、検知線用溝１４の径を極力小さくして、トロリ線本体１０の断面積低下を抑えることが好ましい。具体的には、絶縁体２２の被膜厚さを従来の絶縁抵抗が確保できる下限厚さの０.２ｍｍとすることにより、検知線２０の直径を１.１５ｍｍまで小さくすることが可能となる。これにより、例えば、トロリ線本体１０の公称断面積が１７０ｍｍ２である場合には、１６４ｍｍ２以上のトロリ線本体１０の断面積を確保することができる。 In order not to lower the strength and vibration fatigue resistance of the trolley wire main body 10, it is preferable to reduce the cross-sectional area of the trolley wire main body 10 by reducing the diameter of the detection wire groove 14 as much as possible. Specifically, the diameter of the detection line 20 can be reduced to 1.15 mm by setting the film thickness of the insulator 22 to 0.2 mm, which is a lower limit thickness that can ensure the conventional insulation resistance. Thereby, for example, when the nominal cross-sectional area of the trolley wire main body 10 is 170 mm 2 , a cross-sectional area of the trolley wire main body 10 of 164 mm 2 or more can be secured.
（実施の形態の効果）
上記実施の形態によれば、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線１を提供することができる。このトロリ線１を用いることにより、新幹線等の高速で運転される電気車用の架線をヘビーシンプル架線にして、架線コスト、メンテナンスコストを低減することができる。
(Effect of embodiment)
According to the said embodiment, the trolley wire 1 suitable for the heavy simple overhead wire which has the outstanding vibration fatigue characteristic even in the state where high tension was added can be provided. By using the trolley wire 1, the overhead wire for electric vehicles such as the Shinkansen that is operated at high speed can be changed to a heavy simple overhead wire, and overhead wire cost and maintenance cost can be reduced.
また、トロリ線１が検知線２０を有する場合には、トロリ線本体１０の摩耗量を管理することができ、例えば、トロリ線押上量が局部的に大きくなって局部摩耗が発生する場合であっても、安全を確保することができる。 Further, when the trolley wire 1 has the detection wire 20, the wear amount of the trolley wire main body 10 can be managed, for example, when the trolley wire push-up amount increases locally and local wear occurs. However, safety can be ensured.
（トロリ線の振動疲労特性評価）
公称断面積が１７０ｍｍ２であり、引張荷重が６９ｋＮ以上（引張強さが４３０ＭＰａ以上）であり、導電率が８０％ＩＡＣＳ以上であり、Ｃｕ−Ｓｎ−Ｉｎ系合金からなるトロリ線本体１０に対して、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したところ、１０００万回の振動を加えても断線せず、１０００万回以上の振動に耐えられることがわかった。
(Evaluation of vibration fatigue characteristics of trolley wire)
A trolley wire body 10 having a nominal cross-sectional area of 170 mm 2 , a tensile load of 69 kN or more (tensile strength of 430 MPa or more), a conductivity of 80% IACS or more, and made of a Cu—Sn—In alloy. In addition, when a vibration fatigue test was performed in which 2.5 tons of tension was applied and vibration was applied at a strain of 500 μm, the wire was not disconnected even when 10 million vibrations were applied. I found that I could bear it.
また、公称断面積が１７０ｍｍ２であり、引張荷重が６９ｋＮ以上（引張強さが４３０ＭＰａ以上）であり、導電率が８０％ＩＡＣＳ以上であり、Ｃｕ−Ｓｎ系合金からなるトロリ線本体１０に対して、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したところ、１０００万回の振動を加えても断線せず、１０００万回以上の振動に耐えられることがわかった。 In addition, the nominal cross-sectional area is 170 mm 2 , the tensile load is 69 kN or more (tensile strength is 430 MPa or more), the conductivity is 80% IACS or more, and the trolley wire body 10 made of a Cu—Sn alloy is used. In addition, when a vibration fatigue test was performed in which 2.5 tons of tension was applied and vibration was applied at a strain of 500 μm, the wire was not disconnected even when 10 million vibrations were applied. I found that I could bear it.
以上、本発明の実施の形態及び実施例を説明したが、本発明は、上記実施の形態及び実施例に限定されず、発明の主旨を逸脱しない範囲内において種々変形実施が可能である。 Although the embodiments and examples of the present invention have been described above, the present invention is not limited to the above-described embodiments and examples, and various modifications can be made without departing from the spirit of the invention.
また、上記に記載した実施の形態及び実施例は特許請求の範囲に係る発明を限定するものではない。また、実施の形態及び実施例の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。 The embodiments and examples described above do not limit the invention according to the claims. It should be noted that not all combinations of features described in the embodiments and examples are necessarily essential to the means for solving the problems of the invention.
１ トロリ線
１０ トロリ線本体
１１ 小弧面
１２ 大弧面
１３ 溝
１４ 検知線用溝
２０ 検知線
1 Trolley wire 10 Trolley wire main body 11 Small arc surface 12 Large arc surface 13 Groove 14 Detecting wire groove 20 Detecting wire
Claims (7)
引張強さが４３０ＭＰａ以上であり、銅合金からなるトロリ線本体を有する、トロリ線。 It is a trolley wire for heavy simple overhead wires with a tension of 2.5 tons or more when wired,
A trolley wire having a trolley wire main body made of a copper alloy and having a tensile strength of 430 MPa or more.
前記トロリ線本体の引張荷重が６９ｋＮ以上である、
請求項１に記載のトロリ線。 The nominal cross-sectional area of the trolley wire body is 160 mm 2 or more,
The tensile load of the trolley wire body is 69 kN or more,
The trolley wire according to claim 1.
請求項２に記載のトロリ線。 The conductivity of the trolley wire body is 80% IACS or more,
The trolley wire according to claim 2.
請求項２又は３に記載のトロリ線。 The elongation of the trolley wire body is 3.0% or more,
The trolley wire according to claim 2 or 3.
請求項１〜４のいずれか１項に記載のトロリ線。 The copper alloy is a Cu-Sn-In alloy or a Cu-Sn alloy.
The trolley wire according to any one of claims 1 to 4.
前記溝に摩耗検知用の検知線が挿入された、
請求項１〜５のいずれか１項に記載のトロリ線。 The trolley wire body has a groove at a position below the wear limit position of the trolley wire body;
A detection line for wear detection is inserted in the groove,
The trolley wire according to any one of claims 1 to 5.
請求項６に記載のトロリ線。 The detection line is composed of either an insulated wire or an optical fiber.
The trolley wire according to claim 6.
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